JPH0726937U - Magnetic disk drive - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a 3.5-inch type floppy disk device capable of promptly responding when the shutter of a floppy disk cartridge cannot be opened. [Structure] A rotating plate 43 for opening the shutter 8 of the floppy disk cartridge 1 is provided in a cartridge holder. When the shutter 8 is normally opened, the protrusion 47 of the rotating plate 43 is inserted into the recess 9a of the cartridge 1. When the shutter 8 is not opened, the protrusion 47 does not enter the recess 9a. A limiting portion 48 is provided to limit the turning position of the turning plate 43 on the side surface of the shutter 8. When the shutter 8 is desired to be opened, the cartridge 1 is limited by the limiting portion 48 and the rotating plate 43 and cannot be completely inserted. Thereby, the operator knows the abnormality. The limiting portion 48 is provided on the fixed part in order to achieve a stable limiting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic disk drive device for recording or reproducing signals using a flexible magnetic disk cartridge (floppy disk) or a disk cartridge similar thereto, and more particularly, to prevent incorrect loading of the disk cartridge. The present invention relates to a magnetic disk drive device that can be used.

[0002]

[Prior art]

 A magnetic disk cartridge generally called a micro-floppy disk having a shutter for selectively covering the magnetic head insertion opening and a drive device thereof are known, for example, from Japanese Patent Laid-Open No. 57-36473. In this type of disk drive device, the shutter opening mechanism is configured to interlock with the loading of the cartridge.

[0003]

[Problems to be solved by the device]

 By the way, if the cartridge is slowly inserted into the disk drive, the shutter can be opened well. However, when the cartridge is rapidly inserted, the shutter opening rotation plate does not rotate smoothly and vibrates, making it impossible for the shutter opening rotation plate to come into contact with the predetermined position of the shutter, thus opening the shutter. It may be impossible to do so.

If the shutter is not opened, it becomes impossible to start recording or reproduction. When recording or reproduction is impossible in this way, it is necessary to take out the cartridge and insert it again. At this time, if the cartridge has moved to a predetermined position of the disc rotation mechanism together with the cartridge holder, it is necessary to eject the cartridge by an eject operation, and it is not possible to quickly remove and reinsert the cartridge.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a magnetic disk drive device capable of quickly and accurately taking measures when the shutter is not opened.

[0006]

[Means for Solving the Problems]

 The present invention for achieving the above object will be described with reference to the reference numerals of the drawings showing the embodiments. A magnetic disk 2 is housed in a case 3, and a magnetic head is mounted on the disk 2 on the main surface of the case 3. An opening for inserting a head for contact, an opening 10 for exposing the hub 2b at the center of the disk are provided, and a shutter 8 for selectively covering the opening for inserting the head is provided. The shutter 3 is engaged with the case 3 so as to linearly slide along one side surface of the case 3, and is formed in a U shape so as to extend from the front surface to the back surface of the case 3, and the sliding direction of the shutter 8 The shutter 8 and the case 3 are associated with each other such that a part of one shutter edge portion 8a extending in a direction perpendicular to the projection of the shutter 8 projects from the one side surface of the case 3. Is a device for recording or reproducing information signals using the magnetic disk cartridge 1 provided with a shutter bias spring 70 for biasing the disk in the direction of always closing the disk 2 and engaging with the hub 2b of the disk 2 for rotation. A disk rotating mechanism having a body 17 for rotating the disk 2, a magnetic head for recording or reproducing a signal by contacting the disk 2 through the head insertion opening, and an axial direction of the rotating body 17. It is formed so as to receive the cartridge 1 inserted from the orthogonal direction, and keeps the disc 2 from the disengaged position which keeps the disc 2 disengaged from the rotor 17. The cartridge holder 18 configured to move in the axial direction of the rotating body 17 so as to be guided to the engagement position. The cartridge holder 18 is moved from the disengagement position to the engagement position in response to the normal insertion of the cartridge 1 into the card holder 18, and is ejected from the engagement position to the disengagement position. A cartridge holder moving mechanism for moving, a shutter opening rotating plate 43 rotatably mounted on the cartridge holder 18, and a rotating plate for giving a biasing force to the rotating plate 43 in a direction of ejecting the cartridge 1. When the bias spring 46 and the cartridge 1 are inserted into the cartridge holder 18, they are pressed by the one side surface 3a of the case 3 against the rotating plate bias spring 46 and the shutter edge 8a is moved to the shutter bias. The protrusion 47 provided on the rotating plate 43 so as to press against the spring 70, and the rotating plate 43, 8 is for limiting the turning position of the turning plate 43 substantially corresponding to the turning position of the turning plate 43 when normally opened, and is a limiting portion provided in the fixed portion. And a magnetic disk drive device having the reference numeral 48.

[0007]

[Action]

 The provision of the limiting portion 48 prevents the shutter 8 from being loaded with the disc cartridge 1 in the unopened state. That is, when the cartridge 1 is rapidly inserted, for example, the shutter opening rotation plate 43 vibrates, and the shutter opening protrusion 47 integrally provided on the shutter opening rotation plate 43 causes the normal shutter pressing edge of the shutter. When it comes off from the portion 8a and comes into contact with a portion along one side surface of the case 3, it is restricted by the protrusion 47 and the cartridge 1 cannot be inserted any more. Therefore, the cartridge 1 cannot be loaded, and it is immediately known that the shutter was not opened. Since the limiting portion 48 is provided on the fixed portion, there is no displacement due to vibration or the like, and the rotating plate 43 is stably limited.

[0008]

【Example】

 Next, a magnetic disk drive device according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 10 to 12, a magnetic disk cartridge 1 generally called a micro floppy disk used in this apparatus is constructed by housing a magnetic disk 2 having a diameter of 86 mm in a synthetic resin case 3 having rigidity. It Head insertion openings 6 and 7 are provided on both the front surface 4 and the back surface 5 of the case 3, and the openings 6 and 7 are closed by a slide type shutter 8 when not in use. However, in the case of the single-sided type, the head is inserted into only one of the openings 6 and 7, and the pad is inserted into the other. The shutter 8 is formed in a U shape so as to extend from the front surface 4 to the back surface 5, engages with a groove 71 provided on the back surface 5 with an engaging piece 72, and extends along one side surface 3a of the case 3 as shown in FIG. Slide. A torsion spring 70 is housed in the case 3 in order to bias the shutter 8 to the right (closed direction) in FIG. 3A, and one end of this spring 70 is a protrusion 73 of the shutter 8 shown in FIG. Is pressing. In order to facilitate pressing the shutter 8 to the left in FIGS. 10 and 11 against the bias spring 70, a first recess 9 is provided on one side surface 3a of the case 3, and the shutter is further opened. The second recess 9a is provided corresponding to the completion position. Therefore, the edge portion 8a of the shutter 8 projects somewhat from the one side surface 3a of the case 3. The magnetic disk 2 comprises a magnetic sheet portion 2a and a metal hub 2b mounted in the center thereof. The hub 2b exposed from the opening 10 on the back surface 5 of the case 3 is provided with a spindle insertion hole 2c and a positioning and driving pin insertion hole 2d.

1 to 4 show a part of the magnetic disk drive device in a state where the disk cartridge 1 is not loaded, and FIGS. 5 to 8 show a part of the disk drive device in a disk loaded state. As shown in FIGS. 1 and 6, this disk drive device has one (lower) magnetic head 11 and the other (upper) magnetic head 12 arranged to face the magnetic head 11, and The head 11 is brought into contact with one surface of the disk 2 for recording or reproduction, and the other magnetic head 12 is brought into contact with the other surface of the disk 2 for recording or reproduction. One magnetic head 11 is fixedly mounted on the lower carriage 13, and the other magnetic head 12 is gimbaled by a head support arm 14 by a spring member. The head support arm 14 is rotatably attached to the carriage 13 by a spring hinge composed of a leaf spring 15. The leaf spring 15 and the torsion spring 15a receive a biasing force in a direction to bring the magnetic head 12 into contact with the disk 2. There is. The head carriage 13 is sent in the radial direction of the disk 2 by a head moving mechanism including a stepping motor 13a and a lead screw 13b for converting rotational movement into linear movement.

The disk rotating mechanism is composed of a disk rotating motor 16 shown in FIG. 2 and a disk rotating rotating body 17, that is, a turntable, coupled to the disk rotating motor 16. The rotating body 17 engages with the metal hub 2b of the disk 2 to support and rotate the disk 2, and has a spindle 17a, a magnet 17b for attracting the metal hub 2b, and a positioning and drive pin 17c. It consists of and. The spindle 17a is inserted into the hole 2c provided in the metal hub 2b shown in FIG. 11, and the drive pin 17c is inserted into the hole 2d.

In FIG. 1, the disc cartridge 1 that is inserted from the bottom to the top in FIG. 3 is inserted from the right to the left in FIG. 3, and the disc 2 is not engaged with the rotating body 17 while holding the disc cartridge 1. A cartridge holder 18 is provided for guiding from the first position (non-rotational position) to the second position (rotational position). The cartridge holder 18 has a base portion 19 for supporting the back surface 5 side of the cartridge 1, a pair of side surface portions 20 and 21 rising vertically from the base portion 19, and an upper surface for limiting the position on the front surface 4 side of the cartridge 1. It is composed of parts 22 and 23 and is formed by bending a single metal plate. In addition, four guide pins 24 are planted in the pair of side surface portions 20 and 21, and these are inserted into the guide holes 26a of the supporting base side surface portion 26 shown in FIG. Since the guide hole 26a extends in the vertical direction in FIG. 4, that is, in the axial direction of the rotating body 17 in FIG. 1, it guides the holder 18 in this direction. The hole 25 is for inserting the pin 33 so as to come into contact with the back surface of the cartridge 1.

The cartridge holder moving mechanism for moving the holder 18 in the axial direction of the rotating body 17 has a slide body 27. Similar to the holder 18, the slide body 27 is formed by bending a metal plate into a U-shaped cross section, and has a bottom surface portion 28 in the center parallel to the base portion of the holder 18 and a side surface of the holder 18 that rises vertically from here. It is composed of a pair of side surface portions 29 and 30 arranged in parallel with the portions 20 and 21. The bottom surface 28 of the slide body 27 is provided with four elongated holes 31 extending in the direction in which the disc cartridge 1 is inserted, and a pin 33 planted in a fixed base 32 is inserted therein.

The slide body 27 is guided by the pin 33 and slides in the insertion direction of the cartridge 1. In order to engage the slide body 27 and the holder 18 so as to have a fixed relationship, the side surface portion 29 of the slide body 27 is provided with an inclined groove 34 as shown in FIG. 3 and protrudes from the side surface portion 20 of the volta 18. The pin 24 is engaged with the inclined groove 34. Therefore, when the slide body 27 slides to the right in FIG. 3, the pin 24 is pressed downward by the edge of the inclined groove 34, and the holder 18 moves together with the pin 24 from the position of FIG. 3 to the position of FIG. 7. To do. The springs 35 and 36 shown in FIG. 1 bias the slide body 27 downward in FIG. That is, the springs 35 and 36 give a force to the slide body 27 in the direction for moving the holder 18 to the disc rotation position.

The locking mechanism for locking the slide body 27 against the springs 35 and 36 so that the holder 18 is kept at the disk non-rotation position is composed of a locking lever 37 and a slide shown in FIG. And a locking pin 38 protruding from the body 27. The locking lever 37 has a recess 39 with which the pin 38 is engaged, and further has a pressed portion 40 that is pressed by the cartridge 1. The lever 37 is rotatably supported by a shaft 41 implanted in the base 32, and is biased counterclockwise in FIG. 1 by a torsion spring 42 shown in FIG. When the cartridge 1 is inserted, the pressed portion 40 is pressed, and when the lever 37 rotates clockwise in FIG. 1 against the biasing force of the spring 42, the engagement between the pin 38 and the recess 39 becomes as shown in FIG. As shown, the slide body 27 is released from the engagement by the engagement lever 37.

Reference numeral 43 in FIG. 1 denotes a shutter opening rotation plate, which is rotatably supported by a shaft 45 planted in the holder 18 and biased counterclockwise by a spring 46 shown in FIG. . As shown in FIG. 9, the rotating plate 43 is provided with a pin-shaped hanging protrusion 47 that engages with the shutter 8. Further, a circle having a distance from the shaft 45 to the pin 44 as a radius and having the shaft 45 as the center. The notch 44a is provided at a position corresponding to the circumference. Since the pin 44 is planted in the fixed base 32 and is set to have a length that is substantially in contact with the lower surface of the rotary plate 43 in the unused state of FIGS. 1 and 9, the pin 44 is formed in the cutout portion 44a. As long as it does not come in, the rotating plate 43 and the holder 18 are kept in the position shown in FIG. The protrusion 47 at the tip of the rotating plate 43 is composed of a shaft and a roller rotatably mounted on the shaft.

Reference numeral 48 denotes a rotary plate limiting portion provided according to the present invention, which is provided on the fixed portion or fixed base 32. As is apparent from FIGS. 5 and 10, the rotary plate limiting portion 48 is disposed adjacent to the protrusion 47 at the shutter open position of the rotary plate 43, and the rotary plate 43 rotates further than the shutter open rotary position. It is arranged to limit movement.

The head load control mechanism 49 for bringing the upper head 12 into contact with the disk 2 by interlocking with the slide body 27 includes a projecting portion 50 of the head support arm 14 and interlocking this with the holder 18 and the slide body 27. And a lever 51 for controlling. The lever 51 is rotatably supported by a shaft 52 and has a pin-shaped engaging portion 53 that engages with the slide body 27 and a pin-shaped engaging portion 54 that engages with the protrusion 50. It is biased clockwise by the twisted coil spring 55 in FIG. An inclined surface 56 is provided on the slide body 27 in order to change the rotation angle of the lever 51 according to the change of the position of the slide body 27. When the slide body 27 is in the position of FIG. 1, the engaging portion 53 is engaged with the portion 57 of FIG. 5, but when the slide body 27 moves to the position of FIG. 5, the restriction by the portion 57 is released, The lever 51 rotates counterclockwise, the engaging portion 54 comes to the position shown in FIG. 6, and the head support arm 14 rotates to a position where the upper head 12 contacts the disk.

Next, the operation of this apparatus will be described. First, when recording or reproducing, the cartridge 1 is inserted into the holder 18 in a direction orthogonal to the axial direction of the rotating body 17, that is, in the left direction in FIG. The cartridge 1 advances in a state in which it is restricted between the holder base 19 and the upper surface portions 22 and 23, and the tip of the case 3 of the cartridge 1 is the projection of the shutter opening rotation plate 43. The protrusion 47 engages with the recess 47 of the case 3 and engages with the recess 47. When the insertion of the cartridge 1 is continued, the rotating plate 43 is rotated clockwise in FIG. 1, the shutter 8 is opened by the protrusion 47 as shown in FIG. 10, and the opening 8b of the shutter 8 and the case are opened. The head insertion opening 6 of 3 is aligned, and the disk 2 is exposed. When the rotary plate 43 reaches the position where the shutter 8 is opened as described above, the positions of the pin 44 and the notch 48 are also aligned. On the other hand, when the cartridge 1 is inserted, the pressed portion 40 provided on the locking lever 37 is pressed by the cartridge 1 and the locking lever 37 is rotated clockwise in FIG. The engagement between the pin 38 and the recess 39 is released, and the slide body 27 is free to move. Therefore, the slide body 27 slides downward in FIG. 1 by the force of the springs 35 and 36, and reaches the position of FIG. When the slide body 27 moves to the right in FIG. 5, the pin 24 of the holder 18 is pressed downward by the inclined groove 34, and the pin 24 is inserted into the guide hole 26a shown in FIG. Is also displaced downward. When the holder 18 is displaced to the lower engaging position as shown in FIG. 7, the disk 2 engages with the rotating body 17 and becomes rotatable.

When the slide body 27 is changed from the position of FIG. 1 to the position of FIG. 5, the engaging portion 53 at one end of the head load control lever 51 is disengaged from the portion 57 of the slide body 27, and the lever 51 is forced by the spring 55. Then, it rotates clockwise in FIG. 2 and reaches the position in FIG. At this time, since the position of the engaging portion 54 of the lever 51 is lowered, the head supporting arm 14 is rotated and the pair of heads 11 and 12 come into contact with the disk 2.

When the cartridge 1 is taken out, as shown in FIG. 5, the eject operation section 27a of the protruding slide body 27 is pressed to move the slide body 27 upward in FIG. As a result, the pin 24 is pushed up by the inclined groove 34 shown in FIG. 7, the holder 18 also moves to the position shown in FIG. 3, and the cartridge 1 becomes ready to be taken out. As described above, when the slide body 27 moves upward in FIG. 5, the locking pin 38 enters the recess 39 as shown in FIG. 1 and the locking is established. Further, since the lever 51 is rotated counterclockwise in FIG. 6 by the slide body 27, the head support arm 14 is pushed up to the position shown in FIG.

By the way, the insertion of the cartridge 1 through the opening 59 of the front panel 58 of the container is manually performed. Therefore, the method of inserting the cartridge 1 varies depending on the user, and the cartridge 1 is rapidly inserted and strongly collides with the shutter opening rotation plate 43, and the rotation plate 43 vibrates, so that the first and first cartridges of the cartridge 1 are vibrated. The protrusion 47 may not move smoothly along the concave portions 9 and 9a of the second portion 2, and may get on the side surface of the shutter 8 as shown in FIG. However, since the apparatus of this embodiment has the limiting portion 48 of the protrusion 47, the protrusion 47 is prevented from rotating beyond the normal shutter opening position. That is, the turning position of the turning plate 43 when the protrusion 47 rides on the side surface of the shutter 8 is almost the same as the normal turning position in FIG. If the position of the protrusion 47 is limited as shown in FIG. 11, the insertion position of the cartridge 1 is also limited, and the cartridge 1 cannot be inserted to a predetermined position. That is, the cartridge 1 is not inserted for the distance L corresponding to the protrusion 47 entering the recess 9a in FIG. If the carridge 1 is not inserted to the predetermined position, the pressed portion 40 of the locking lever 37 cannot be pressed by the cartridge 1, so the locking lever 37 is kept in the locked state as shown in FIG. Also, the holder 18 does not move, and the cartridge 1 does not reach the completely loaded position. Then, when the manual insertion operation of the cartridge 1 is released, the rotating plate 43 is rotated counterclockwise in FIG. 11 by the force of the spring 46, and the cartridge 1 is discharged. As a result, it is possible to know the loading error of the cartridge 1.

If the restriction portion 48 according to the present invention is not provided, the cartridge 1 can be inserted to the normal position even if the shutter 8 is not opened as shown in FIG. The lock by the stop lever 37 is released, and the cartridge 18 is moved by the holder 18 toward the disc rotation position in FIG. 6 while the shutter 8 is closed. As a result, the user cannot immediately know whether or not the shutter 8 is open.

Even if the front and back of the cartridge 1, or the left and right, or the front and back are mistakenly inserted, it is impossible to completely insert the cartridge 1 in the same manner as described above. Is discharged.

The present invention is not limited to the above embodiment, but can be modified. For example, the turning position of the turning plate 43 may be limited to other than the protrusion 47.

[0025]

As is apparent from the above, according to the present invention, when the shutter is not accidentally opened, the cartridge cannot be loaded, so that the insertion without opening the shutter can be quickly and easily detected. be able to. In addition, by making the insertion of the cartridge impossible due to the function of the restriction portion, it is possible to prevent the cartridge holder moving mechanism from unnecessarily moving the cartridge holder. As a result, the cartridge can be quickly taken out of the cartridge holder and reinserted. Further, since the limiting portion is provided on the fixed portion, the position of the shutter opening rotating plate and the position of the cartridge can be accurately limited regardless of the vibration of the cartridge holder.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of a magnetic disk drive device according to an embodiment of the present invention.

FIG. 2 is a partially omitted front view of the apparatus of FIG.

FIG. 3 is a side view showing a part cut along line AA in FIG.

FIG. 4 is a left side view of the device of FIG.

5 is a plan view of the apparatus of FIG. 1 in a cartridge mounted state.

6 is a partially omitted front view of the device of FIG.

FIG. 7 is a side view showing a state in which a part of line BB in FIG. 5 is cut.

FIG. 8 is a left side view of FIG.

FIG. 9 is a perspective view of a shutter opening rotating plate portion.

FIG. 10 is a plan view showing the relationship between the cartridge and the shutter opening rotary plate portion.

FIG. 11 is a plan view showing a cartridge and a rotating plate portion in a state where opening of the shutter has failed.

FIG. 12 is a bottom view of the cartridge.

[Explanation of symbols]

 1 Magnetic Disk Cartridge 2 Magnetic Disk 3 Case 6, 7 Opening 8 Shutter 9, 9a Recess 18 Cartridge Holder 27 Slide Body 43 Shutter Opening Rotating Plate 46 Spring 47 Projection 48 Restriction Part

Front page continuation (72) Inventor Yuji Tsuruguchi, 3-7-3 Nakamachi, Musashino-shi, Tokyo Inside Teaac Co., Ltd. (72) Inventor Akira Sakai, 3-7-3 Nakamachi, Musashino-shi, Tokyo Teac Co., Ltd. Within

Claims (1)

[Scope of utility model registration request] 1. A magnetic disk (2) is housed in a case (3), a head insertion opening for contacting a magnetic head to the disk (2) is provided on a main surface of the case (3), and a disk of the disk. An opening (10) for exposing the central hub (2b) is provided, and a shutter (8) for selectively covering the head insertion opening is provided, and the shutter (8) is provided in the case (3). The shutter (8) is engaged with the case (3) so as to linearly slide along one side surface and is formed in a U shape so as to extend from the front surface to the back surface of the case (3). The shutter (8) and the case (3) are related so that a part of one shutter edge (8a) extending in the direction perpendicular to the moving direction projects from the one side surface of the case (3). Attached the shutter (8) A device for recording or reproducing an information signal by using a magnetic disk cartridge (1) provided with a shutter bias spring (70) for biasing the shutter in the closing direction at all times, the hub of the disk (2) ( A disk rotating mechanism for rotating the disk (2) having a rotating body (17) engaging with the disk (2b), and recording or reproducing a signal by contacting the disk (2) through the head insertion opening. A magnetic head and a cartridge (1) inserted from a direction orthogonal to the axial direction of the rotating body (17), and the disk (2) with respect to the rotating body (17). To move in the axial direction of the rotating body (17) in order to guide the disk (2) from the disengaged position that keeps the disengaged state to the engaging position where the disc (2) engages with the rotating body (17) Composed And a cartridge holder (18) for moving the cartridge holder (18) from the non-engaging position to the engaging position in response to the normal insertion of the cartridge (1) into the cartridge holder (18). A cartridge holder moving mechanism for moving the cartridge holder from the engagement position to the non-engagement position by an eject operation; a shutter opening rotation plate (43) rotatably attached to the cartridge holder (18); A rotating plate biasing spring (46) for applying a biasing force to the rotating plate (43) in the direction of ejecting the cartridge (1), and the cartridge (1) to the cartridge holder (1).
8) is pushed by one side surface (3a) of the case (3) against the rotating plate bias spring (46) and the shutter edge (8a) is moved to the shutter bias spring (70). The rotating plate (43) so as to press against the
The protrusion (47) provided on the rotary plate (43) and the rotary plate (43) substantially corresponding to the rotary position of the rotary plate (43) when the shutter (8) is normally opened. A magnetic disk drive for limiting the rotational position of a plate (43), comprising a limiting portion (48) provided on a fixed portion.